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Customer.io

Senior Backend Engineer

Job Summary

The role involves developing and maintaining scalable distributed applications in Go within a cloud infrastructure, with a focus on performance and reliability. Candidates should have extensive experience working with cloud environments, RDBMS like MySQL, and collaborative development practices such as code reviews and pair programming. The position emphasizes mentoring, customer support, understanding scalability challenges, and integrating AI tools into workflow. It offers a remote-first environment with various employee benefits aimed at supporting work-life balance and professional growth.

Required Skills

Cloud Infrastructure
Go
Customer Support
MySQL
Code Review
Scalability
AI Integration
Pair Programming
Distributed Applications
UNIX Environment
Collaborative Development

Benefits

Home Office Budget
Paid Parental Leave
Co-working Space Reimbursement
Remote Work Stipend
Unlimited PTO
Sabbatical
Healthy Lifestyle Budget
Professional Education Budget
Paid Insurance Premiums
Retirement Matching

Job Description

We are seeking a Senior Backend Engineer to join our growing Engineering team!

Customer.io is looking for collaborative senior scaling developers who love solving interesting puzzles and are excited to help us build a scalable platform that our customers love. Our small, remote-first team is fun-loving, passionate, and highly effective. We offer many opportunities to grow and refine your skills while having a significant impact. Our team members have backgrounds in various industries, from AdTech to Gaming. We believe embracing our unique perspectives and expertise is the key to our success as a collaborative team.

As a distributed company, we value diversity and are committed to giving you the flexibility and freedom to work from anywhere in the world on a schedule that fits your family and your life.

Some things you'll do

  • Be a model and mentor for writing well-architected, well-tested, and easy-to-understand services in Go that help our customers easily send timely & relevant messages at scale.
  • Apply your unique perspective to help us define and build the next generation of features and infrastructure needed to help our customers and company flourish.
  • Work with our tech support teams to diagnose operational issues and help our customers achieve their goals with our product.
  • Take an active role in a friendly, supportive team that encourages you and the company to grow as individuals, professionals, and teams.
  • Mentor your coworkers through code review, pair programming, team collaboration, and training to help improve our collective knowledge and best practices.

About you

  • Works in North/South American time zones
  • Preferably 7+ years of relevant experience.
  • A track record of delivering performant and scalable distributed applications on cloud infrastructure in Golang.
  • A collaborative mindset backed by excellent communication skills and a desire to help us make great decisions in an empathetic and respectful way.
  • An AI-forward mindset, excited by how AI is reshaping software development and integrating AI tools into your workflow to prototype, iterate, and ship smarter and faster
  • Experience working with customers and applying a deep understanding of their needs to produce timely solutions to their real-world problems.
  • A solid understanding of scalability problems and experience building out performant distributed applications on cloud infrastructure.
  • Comfort working in UNIX environments and applying modern collaborative development practices.
  • Experience in working with RDB systems, preferably MySQL.
  • Ability to deliver high-quality solutions quickly and without mentorship.
  • Experience working within a distributed company is preferred.

About Customer.io

Our mission at Customer.io is to power automated communication that people like to receive. Today over 7,400 internet businesses use Customer.io to manage, send, and track the performance of emails, SMS, push notifications, and in-app messages. Unlike typical marketing platforms, Customer.io helps businesses increase relevance by using behavioral data: what people do or don’t do when logged in to a web or mobile app.

We are offering a starting salary of $150,000 - $200,000 USD (or equivalent in local currency) depending on experience and subject to market rate adjustment.

Benefits at Customer.io include:

  • Unlimited PTO - we encourage at least 20 vacation days (in addition to holidays and sick days) so that you can unwind, unplug, and recharge
  • 16 weeks paid parental leave (including adoption and foster care)
  • 100% paid insurance premiums for you and your dependents
  • 401k retirement matching - up to 5% dollar-for-dollar match to retirement contributions
  • $1,500 annual healthy lifestyle budget (for gym memberships, classes, fitness equipment)
  • $250/monthly Remote Work Stipend to be used for home internet, cell phone, and other miscellaneous remote work costs
  • $300/month co-working space rental reimbursement
  • $2,000/yearly professional education budget for conferences, courses, workshops, books, etc.
  • $1,500 home office budget to make sure your working space is ergonomic and just what you need to do your best work!
  • One month sabbatical after five years at Customer.io
  • We also have opportunities to meet in person with your peers throughout the year

All final candidates will be asked to complete a background check and employment verifications as part of our pre-employment process.

Customer.io recognizes the stifling impact of systemic injustice on diverse communities. We commit to using our influence to increase inclusion and equity within the tech industry. We strive to build an inclusive team culture, implement bias-free hiring practices, and develop community partnerships to expand our global impact.

Join us!

Check out our careers page for more information about why you should come work with us! We are passionate about our core values of Empathy, Transparency, Responsibility, and Awkwardness and are looking for new coworkers to share and build that passion!

How to apply

Apply at the link below and tell us why you're interested in the position! ****We aim to respond to all applicants with a status update about your application, provided no technical issues or other limitations prevent us from doing so. Please keep an eye on your email for updates.

Here's what you can expect from our hiring process:

  1. 30 minute video call with a Recruiter
  2. 60 minute Technical Interview
  3. Take Home Assignment + 60 minute Assignment Review Call
  4. 60 minute Final Interview with Hiring Manager

Interested in this job?

Applications are no longer being accepted for this job.

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Customer.io

Explore Customer.io, the data-driven platform for personalized customer journeys across all channels, fueled by first-party data.

See more jobs
Date PostedMay 28th, 2025
Job TypeFull Time
LocationAmericas Remote
Salary$150,000 - $200,000
Application DeadlineExpired
Exciting remote opportunity (requires residency in Canada, Mexico, United States, Argentina, Brazil, Chile, Colombia, Peru) for a Senior Backend Engineer at Customer.io. Offering $150,000 - $200,000 (full time). Explore more remote jobs on FlexHired!

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